#!/bin/sh

# of bash, die klaagt niet over - ^C/usr/local/bin/m4d: 99: cannot open var/run/mariposa-4: Interrupted system call

# m4d - daemon for mariposa-4, in order to enable 2 separate players using
#  the network.  to be run as a normal (i.e. non-root) user.

# warning: this daemon is a very crude hack.  don't run it, unless you know what
# you're getting yourself into.  i wrote it mainly to learn, not to actually
# use.

# this script needs ucspi-tcp-ipv6's tcpserver, by djb e.a.

# Copyright © 2011 Joost van Baal-Ilić
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License, as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.  There is NO warranty.  A copy of the GNU GPL is available from
# http://www.gnu.org/licenses/.

# monitoring
## set -m

## set -x

# of naar syslog
# exec 2>/tmp/err

# FIXME honor MP4_DEBUG

rdir=var/run
ldir=var/log
n=mariposa-4
rf=$rdir/$n
lf=$ldir/$n

# cd to / or ~/
cd $HOME

# FIXME
# killall mariposa-4 2>/dev/null
# killall tcpserver 2>/dev/null

for d in $rdir $ldir
do
  test -d $d || mkdir -p $d
done


# FIXME
# test -f m4w || cat <<EOT >m4w
# #!/bin/sh
# cat >var/run/mariposa-4
# EOT
# chmod a+x m4w m4r

echo "press ^c to stop this daemon"

# FIXME
# on exit
# trap "echo trapped; killall tcpserver 2>/dev/null; exit" 0 INT QUIT TSTP USR1
# trap "echo trapped; exec 2>/dev/null; exit" 0 INT QUIT ABRT
# trap "echo trapped; exec 2>/dev/null; exit" INT QUIT ABRT
trap 'kill $m4rpid $m4wxpid $m4wopid; exit' INT QUIT ABRT
# EINTR?
# ^c is QUIT

while sleep 1
do
  rm -f $rf
  mkfifo $rf
  : >$lf

  tcpserver -c1 -B"Welcome to mariposa-4, player o.
You are invited to start the game
now: it's your turn.  To play, type
0, 1, ... 5 or 6; and <enter>.
" 0 4443 sh -c 'cat >'$rf &
  m4wopid=$!

  tcpserver -c1 -B"Welcome to mariposa-4, player x.
Once player o made a move, it's your turn.
Than, type 0, 1, ... 5 or 6; and <enter>.
" 0 4444 sh -c 'cat >'$rf &
  m4wxpid=$!

  # both players should connect to this port, to view the game
  # tcpserver 0 4445 ./m4r &
  tcpserver 0 4445 sh -c 'tail -F '$lf' 2>/dev/null' &
  m4rpid=$!

  mariposa-4 <$rf >$lf

  # FIXME
  # killall tcpserver tail m4r 
  # killall tcpserver m4r 

  # jobs awk
  # kill %1 %2 %3
  kill $m4rpid $m4wxpid $m4wopid

done